Goodwill and Intangible Assets	9 Months Ended
Goodwill and Intangible Assets	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets In connection with its November 1, 2013 acquisition of HCN, the Company applied FASB ASC 805, Business Combinations, using the acquisition method of accounting. The Company recorded $38.6 million of goodwill, representing the excess of the purchase price over the amount assigned to the net assets acquired and the fair value assigned to identified intangible assets, and recorded $8.1 million of identified intangible assets. In August 2016, the Company completed an interim goodwill assessment and recorded a $4.7 million impairment. Subsequently, the Company completed its annual goodwill assessment and determined that the fair value exceeded the carrying value. In connection with the preparation of these unaudited interim Consolidated Financial Statements, the Company completed a qualitative assessment of goodwill that included a review of all the events and circumstances listed in FASB ASC 350, Intangibles - Goodwill and Other, in addition to other entity-specific factors. For example, the Company considered the increase in HCN student enrollment and revenue for the three months ended September 30, 2017 as compared to the same period in 2016. The Company also considered that the competitive marketplace in the HCN industry did not change and that the capital markets for education companies increased in recent periods. Lastly, the Company considered the quantitative analysis performed at the last annual goodwill assessment that determined that the fair value exceeded the carrying value. After review of events and circumstances it was concluded that goodwill was not impaired as of September 30, 2017.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.